countersink : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: countersink	by the DICT Development Group
3 results for countersink
From WordNet (r) 3.0 (2006) [wn]:
countersink n a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface a bit for enlarging the upper part of a hole Synonym(s): counterbore, countersink, countersink bit v insert (a nail or screw below the surface, as into a countersink) Synonym(s): set, countersink
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Countersink \Coun"tersink`\ (koun"t[etil]rs[icr][nsm]k`; 277), v. t. [imp. & p. p. {Countersunk} (-s[ucr][nsm]k`); p. pr. & vb. n. {Countersinking}.] 1. To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw. 2. To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Countersink \Coun"ter*sink`\, n. 1. An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt. Note: In the United States a flaring cavity formed by chamfering the edges of a round hole is called a countersink, while a cylindrical flat-bottomed enlargement of the mouth of the hole is usually called {a conterbore}. 2. A drill or cutting tool for countersinking holes.